1 files changed, 20 insertions, 0 deletions
diff --git a/test/asan/TestCases/use-after-poison.cc b/test/asan/TestCases/use-after-poison.cc
new file mode 100644
index 0000000000000..3b247ff531b9b
--- /dev/null
+++ b/test/asan/TestCases/use-after-poison.cc
@@ -0,0 +1,20 @@
+// Check that __asan_poison_memory_region works.
+// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
+//
+// Check that we can disable it
+// RUN: env ASAN_OPTIONS=allow_user_poisoning=0 %run %t
+
+#include <stdlib.h>
+
+extern "C" void __asan_poison_memory_region(void *, size_t);
+
+int main(int argc, char **argv) {
+  char *x = new char[16];
+  x[10] = 0;
+  __asan_poison_memory_region(x, 16);
+  int res = x[argc * 10];  // BOOOM
+  // CHECK: ERROR: AddressSanitizer: use-after-poison
+  // CHECK: main{{.*}}use-after-poison.cc:[[@LINE-2]]
+  delete [] x;
+  return res;
+}